Overview
The ZF 5838.300.732 PINION is a critical drive component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part transfers rotational force from the input shaft to the differential assembly, ensuring smooth torque distribution within the gearbox. Machined from case-hardened alloy steel, the 5838.300.732 pinion meshes directly with the ring gear to convert engine power into axle movement. As a precision-ground component, it maintains exact tooth geometry to minimize backlash and vibration during heavy-load operations. This pinion is commonly replaced during a full transmission rebuild alongside the 5838109019: DIFFERENTIAL and 0750117075: TAPER ROLLER BEARING to restore factory tolerances.
Symptoms of Failure
- Whining or howling noise during acceleration: Worn pinion teeth create a high-pitched metallic sound that intensifies under load, often indicating pitting or spalling on the gear face.
- Vibration in the driveline at highway speeds: Excessive pinion bearing play causes rhythmic shaking through the chassis, especially noticeable between 45-65 mph.
- Oil leaks near the pinion seal area: A damaged pinion shaft surface or worn seal lip allows transmission fluid to weep, leaving visible drips on the bell housing.
- Gear slippage or delayed engagement: Stripped pinion teeth prevent proper meshing with the differential, causing intermittent power loss when shifting between forward gears.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 5838.300.732 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Tooth Count | 12 teeth (estimated) |
| Pitch Diameter | 48.5 mm |
| Shaft Diameter | 28.0 mm |
| Overall Length | 142.0 mm |
| Weight | 1.85 kg (4.08 lbs) |
| OEM Reference | ZF 5838.300.732 |
| Heat Treatment | Carburized & tempered to HRC 58-62 |
Compatibility
This pinion is specifically designed for ZF WG-series transmissions, including the WG100, WG130, and WG131 models. It also fits select WG180 and WG200 variants produced after 2005, provided the differential housing uses the same spline count. Always verify the 2093209024: DIFFERENTIAL and 0631329088: SPRING PIN are compatible with your specific transmission serial number before installation. This part is not interchangeable with older WG80 or WG90 series units without modifying the carrier assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109019 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports pinion shaft radial loads |
| 2093209024 | DIFFERENTIAL | Secondary differential for WG130 |
| 0631329088 | SPRING PIN | Secures pinion to shaft |
| 5838300811 | THRUST WASHER | Controls axial clearance |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 5838300633 | AXLE | Driveshaft connection |
| 5838300753 | THRUST WASHER | Reduces friction on pinion base |
| 5838300818 | THRUST WASHER | Spacer for differential assembly |
| 5838300724 | DIFFERENTIAL HOUSING | Encloses gear set |
ZF 5838.300.732 PINION – Gear RFQ Support
ZF 5838.300.732 PINION is handled as a gear-train sourcing item for transmission repair teams. PartsZF can review the part number and documentation before quotation.
Part-Number Summary
Use ZF number 5838.300.732 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
This gear supports gear train repair, rebuild, and part-number matching work. Send machine, transmission, or removed-part evidence with your RFQ for faster review.
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 5838.300.732 |
|---|---|
| Normalized SKU | 5838300732 |
| Part name | PINION |
| Product category | gear |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
| Weight | 7.85 |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
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- ZF 4642.353.026 SPUR GEAR
- ZF 4143.142.013 GEAR SHIFT SENSOR
- ZF 4143.142.022 GEAR SHIFT SENSOR
